linux-kernel - Re: [PATCH v12 04/12] dmaengine: imx-sdma: remove duplicated sdma_load

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Date:   Mon, 17 Aug 2020 07:38:20 +0200
From:   Richard Leitner <richard.leitner@...data.com>
To:     Robin Gong <yibin.gong@....com>
CC:     <mark.rutland@....com>, <broonie@...nel.org>, <robh+dt@...nel.org>,
        <catalin.marinas@....com>, <vkoul@...nel.org>,
        <will.deacon@....com>, <shawnguo@...nel.org>, <festevam@...il.com>,
        <s.hauer@...gutronix.de>, <martin.fuzzey@...wbird.group>,
        <u.kleine-koenig@...gutronix.de>, <dan.j.williams@...el.com>,
        <matthias.schiffer@...tq-group.com>, <frieder.schrempf@...tron.de>,
        <r.schwebel@...gutronix.de>, <linux-spi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <kernel@...gutronix.de>,
        <dmaengine@...r.kernel.org>, <linux-imx@....com>
Subject: Re: [PATCH v12 04/12] dmaengine: imx-sdma: remove duplicated
 sdma_load_context

On Tue, Aug 11, 2020 at 11:53:43PM +0800, Robin Gong wrote:
> Since sdma_transfer_init() will do sdma_load_context before any
> sdma transfer, no need once more in sdma_config_channel().
> 
> Signed-off-by: Robin Gong <yibin.gong@....com>
> Acked-by: Vinod Koul <vkoul@...nel.org>

Hi Robin,
thanks for the pointer to this patch.

As you suggested I've tested the two patches on my custom i.MX6DL
board. Therefore please feel free to add:

Tested-by: Richard Leitner <richard.leitner@...data.com>

regards;rl

> ---
>  drivers/dma/imx-sdma.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index d305b80..5411e01e 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -1137,7 +1137,6 @@ static void sdma_set_watermarklevel_for_p2p(struct sdma_channel *sdmac)
>  static int sdma_config_channel(struct dma_chan *chan)
>  {
>  	struct sdma_channel *sdmac = to_sdma_chan(chan);
> -	int ret;
>  
>  	sdma_disable_channel(chan);
>  
> @@ -1177,9 +1176,7 @@ static int sdma_config_channel(struct dma_chan *chan)
>  		sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */
>  	}
>  
> -	ret = sdma_load_context(sdmac);
> -
> -	return ret;
> +	return 0;
>  }
>  
>  static int sdma_set_channel_priority(struct sdma_channel *sdmac,
> -- 
> 2.7.4
> 
> 

-- 
Richard Leitner
Hardware R&D / Senior Embedded Linux Engineer

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